If you or anyone else needs to find the total (or partial) volume of a horizontal (or vertical) cylindrical vessel with 2:1 Ellipsoidal (or ASME F&D, Flat, Hemispherical, & dished)heads, let me know and I'll send you a copy of my Exel 2000 workbook that does this for you, complete with formulas and references. I've already posted this in another thread (which I forgot) sometime back, and I've emailed out over 50 replys.
My worksheets are pretty simple to use. All you are required to furnish is the basic data like I.D., T/T length, & type of heads. You also get a Strapping table.
My email is:
artmontemayor37@hotsheet.com
Art Montemayor
Spring, TX